Comment Feed for Channel 9 - Project JSMeter: JavaScript Performance Analysis in the Real Worldhttp://video.ch9.ms/ch9/f6d9/afaea3b9-f7ac-4230-8529-1b62c398f6d9/E2E-Research-Perspectives-on-JavaScript-with-Erik_220.jpgChannel 9 - Project JSMeter: JavaScript Performance Analysis in the Real WorldJavaScript is the most widely used programming language on the web. As the great
Douglas Crockford
likes to say, JavaScript is both the world's most popular programming language and the world's least popular programming language
at the same time.In this episode of Expert to Expert (to Expert), Erik Meijer joins MSR research scientists Ben Livshits and
Ben Zorn to talk about JavaScript, project JSMeter and today's trends in web programming.
Dr. Zorn and Dr. Livshits have been doing a significant amount of research on how JavaScript is used in the real world by analyzing JS execution on large-scale (JS-heavy) commercial web sites. Their formal exploration of JS executing in the real world, Project JSMeter,
has yielded results, which seem to indicate that current JS performance test suites are at best suspect in terms of how JavaScript is
actually running on the web, in production, on real sites, etc. But
read the findings and make your own judgments, of course. Tune in. Enjoy. enThu, 22 Feb 2018 05:22:56 GMTThu, 22 Feb 2018 05:22:56 GMTRev9Re: Project JSMeter: JavaScript Performance Analysis in the Real World
I watched this two weeks ago and skimmed the paper. Now I have this question: Have you studied the number of (simultaneous) XmlHttpRequests most web apps make?

posted by ShinNoNoir

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Wed, 14 Apr 2010 13:30:05 GMThttps://channel9.msdn.com/Shows/Going+Deep/E2E-Research-Perspectives-on-JavaScript-with-Erik-Meijer-Ben-Zorn-and-Ben-Livshits#c634068486050000000ShinNoNoirRe: Project JSMeter: JavaScript Performance Analysis in the Real World
I just FW'd it to the two Bens.

C

posted by Charles

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Thu, 15 Apr 2010 21:18:41 GMThttps://channel9.msdn.com/Shows/Going+Deep/E2E-Research-Perspectives-on-JavaScript-with-Erik-Meijer-Ben-Zorn-and-Ben-Livshits#c634069631210000000CharlesRe: Project JSMeter: JavaScript Performance Analysis in the Real World
Thanks for the question. We did not measure the number of simultaneous XmlHttpRequests in our current study, although that's an interesting question. There are a number of additional measures like that including the ways the typical WebApps interact with
the DOM that we are also interesting in knowing. While we do not have concrete plans right now for collecting such data, if we do get it, we'll make it available from our project website.

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Sat, 24 Apr 2010 03:25:00 GMThttps://channel9.msdn.com/Shows/Going+Deep/E2E-Research-Perspectives-on-JavaScript-with-Erik-Meijer-Ben-Zorn-and-Ben-Livshits#c634076763000000000weRe: Project JSMeter: JavaScript Performance Analysis in the Real World
Thanks for your question. We are aware of the related blog post and disagree with the conclusions the author reaches. Specifically, the analogy with the elephant, while quite visually provacative, is inaccurate. The implication is that browser users want
to drive their browsers on a racetrack all day (e.g., the benchmarks). Browser users want high performance, but not for small benchmarks that don't correspond to their daily experience. A better analogy would be to consider driving your browser down a
city street in traffic. In that case, which we argue is the common case, the fact that your browser performs like a Porsche on a racetrack isn't as meaningful. What the user cares about is how it handles in traffic. We are presenting this research at the
WebApps 2010 conference in Boston, on June 23, 2010 (http://www.usenix.org/events/webapps10/).